

let getGeoJson = function () {
    // 点
    let point = {
        "type": "Feature",
        "geometry": {
            "type": "Point",
            "coordinates": [102.0, 0.5]
        },
        "properties": {
            "prop0": "value0"
        }
    }

    // 线
    let line = {
        "type": "Feature",
        "geometry": {
            "type": "LineString",
            "coordinates": [[102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]]
        },
        "properties": {
            "prop0": "value0",
            "prop1": 0.0
        }
    }

    // 面
    let polygon = {
        "type": "Feature",
        "geometry": {
            "type": "Polygon",
            "coordinates": [[100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0]]
        },
        "properties": {
            "prop0": "value0",
            "prop1": {
                "this": "that"
            }
        }
    }

    return {
        "type": "FeatureCollection",
        "features": []
    };
};